Lathe.



J. FEIGE.

v LATHE.

APPLICATION FILED MAY 23, 1912.

Patented Oct. 7, 1913.

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A TE 6 INVENTOK JOSEF' FEIGE ATTORNEY J. FEIGE.

LATHE.

APPLICATION FILED MAY 23, 1912.

1,075,246. Patented 0011731913.

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1 4 L y k l? a: z 771, I

E L J F'GLS- \NVENTOK JosEF FElG-E ATTORNEY COLUMBI A PLANDGRAPH c0..WASHiNa'roN, D. c.

JOSEF FEIGE, OF LUDWIGSDORF, GERMANY.

LATHE.

Application filed. May 23, 1912.

To all whom it may concern Be it known that I, Josnr FEIGE, a subject ofthe German Emperor, and resident of Ludwigsdorf, Neurode district,Germany, have invented certain new and useful Improvements in Lathes, ofwhich the following is a specification.

The subject matter of the invention is a dividing device capable ofattachment to any lathe, by means of which the periphcry of circularworkpieces can be divided into as many equal parts as desired and workedstep by step at the dividing points without special aids such asratchets, counter-shafts and the like. This is accomplished by fasteningto a worm-shaft mounted on the head stock and capable of swinging aboutits foot a worm wheel which, for the purpose of step by step rotation ofthe lathe shaft, can be engaged in the toothed rim of the cone pulleyand se cured in its engaged position, while to regulate the steps ofrotation a disk provided with circular graduation is attached to themovable mounting of the worm crank shaft, above which disk extends anindicator fastened to the worm-shaft, so that the workpiece fastened tothe lathe shaft can, at each step divided ofi' be worked with a cuttingdevice to be clamped to the tool-carrier, without the necessity ofmarking the dividing points of the work-piece. The graduated disk isprovided with a graduation as fine as desired and is arrangedhorizontally. Moreover, an auxiliary indicator, is provided adjustablein advance of and opposite the main indicator connected with the wormshaft, whereby it is made possible to carry out quickly and safely withthe same graduated disk the most diverse intermediate divisions as fineas may be desired, without the fear of error.

One form of construction of the invention is shown in the drawing.

Figure l is a front view. Fig. 2 is a plan view. Fig. 3 is a side view.Fig. 4 shows an auxiliary disk and Fig. 5 the tables above the auxiliarydisks necessary to the various divisions.

On the head stock 5 of the lathe is fastened a fast head stock 0, inwhich a pedestal h is displaceably arranged, which is securedSpecification of Letters Patent.

Patented Oct. '7, 1913.

Serial No. 699,195.

in the disengaged end position by a spring pressed snap bolt resting ona flat spring m. In the pedestal is mounted a vertical shaft a whichrests below upon a point cl, so that it can follow the movements of theupper pedestal h. The shaft carries a worm wheel 6 which can be broughtinto engagement with the toothed rim c" of the cone pulley or a gearprovided in place of the latter and is secured in this position by aspring 70 acting upon the shaft a. The tension of the spring can beregulated by a screw Z.

Upon the upper portion h of the shaft pedestal h is fastened a disk 9,which is provided with circular graduation, for in stance from 0-96 andsubordinate divisions between the main dividing points. The shaft apasses through the disk and carries, above the same, a horizontal handlef, which is continued in its opposite part into an indicator f whichupon rotation of the handle runs over the circular disk g. The handle isheld in its position by a screw 9.

Adjustable upon the shaft a and under neath the handle is attached anauxiliary indicator 0 by means of a set screw 8, which auxiliaryindicator can be set in advance of the main indicator and in carryingout uneven divisions shows the point at which the main indicator mustcome to a stop at the end of each divisional step. On the handle f isattached another auxiliary indicator 29 which is diametrically oppositethe main indicator f and indicates at the end of each divisional stepthe stopping place of the main indicator upon half rotations of thehandle. Beneath the auxiliary indicator 0 a screw nut r rests upon theshaft a, which when auxiliary disks are employed serves to fasten sameupon the main graduated disk.

If the worm wheel 6 is brought into engagement with the toothed rim 2"of the cone pulley i, then by rotation of the handle with the aid of theindicator f which runs over the disk graduation, and in certain caseswith the aid also of the two auxiliary indicators 0 and 20, the conepulley can be moved forward step by step for any desired number of toothlengths and the periphery of the work piece fastened to the lathe shaftcan be divided into a definite number of equal parts. If, for instance,the toothed rim of the cone pulley has 96 teeth and the disk 9 adivision of 96 lines, the rotations of the handle necessary for eachdivisional step of a work piece into, say, 2, 3, 4:, 6, 8, 12, 16, 24,32, 48, 96 parts, is established by dividing the desired number ofdivisions into the number 96. Hence if it is desired to divide the workpiece in 12 parts, for instance, the handle must be rotated 8 times foreach divisional step, with 24 parts four times, etc. But if a divisionis required the number of which does not go into 96, in addition to acertain number of complete revolutions of the handle, a fraction of arotation is also necessary. In order to determine this easily upon thedisk 9 during the process of dividing, the auxiliary indicator 0 isplaced in advance of the main indicator f by the space of the necessarypartial rotation. Then after each division carried out, it indicates onthe disk 9 the final position which the main indicator must occupy inthe following division. Thus, for instance, the division of a work pieceinto 60 parts requires 1% rotations of the main indicator for eachdivisional step. In this case the auxiliary indicator 0, after theloosening of its set screw 8, is placed at the graduation mark which isdistant from the indicator f and then for the first divisional step thehandle is given one complete rotation, the graduation mark is noted onwhich the auxiliary indicator 0 now stands, and the main indicator f isrotated to the position vacated by the auxiliary indicator 0, wherebythe first 1/60 divisional step is completed. The further steps follow inthe same manner. The adjustment of the auxiliary indicator 0 is notnecessary for rotations, since the auxiliary indicator p, diametricallyopposite to the main indicator f automatically indicates thesemi-rotations.

In order not to be obliged, when carrying out uneven divisions, tocompute the proportion of division each time in advance, wherebymistakes and errors arise, it is expedient to use auxiliary graduateddisks t (Fig. i) of paper or cardboard which are provided with thedesired uneven division and must be attached to the main graduated diskbefore work is commenced. For this purpose the screw 9, the handle f andthe auxiliary indicator 0 as well as the screw nut r are removed fromthe shaft a, the auxiliary disk is placed upon the graduated disk 9 andis fastened by raising the screw nut r to the main disk g. Then theauxiliary indicator 0 and the handle f are re-attached to the shaft aand the connection is secured by the screw nut q. The auxiliary diskshown in Fig. t is divided into 59 parts. Since the cone pulley 2" has96 teeth, to carry out one divisional step the handle I) must take 96/59or 1 and 37/59 rotations, This number is noted on the disk, so thatwithout previous computation the auxiliary indicator 0 can beimmediately placed upon the graduation line 37 of the auxiliary disk andit then states the positions which the main indicator must occupy as afinal position in carrying out one divisional step. Provided thegraduation of the auxiliary disk shows no primary'figures, intermediatedivisions also can naturally be carried out with the auxiliary disks.Thus, for instance, with the auxiliary disk divided into 11 parts thedivisions 22, 33, 14 and 66 can also be carried out. In order to be ableto determine immediately the auxiliary disk necessary for a certaindivision, the auxiliary disks are provided with serial numbers which arenoted in a table (Fig. 5) together with the number of divisions. In thistable column I gives the number of divisions and column II the disknumber belonging to it. Thus, for instance, for carrying out thedivision 7 the auxiliary disk 3 is necessary, for carrying out thedivision 59 the auxiliary disk 22.

By the spring 70 acting upon the shaft (1 the worm wheel a is secured inits position of engagement with the toothin i of the cone pulley i, sothat the work plece stands immovable at each divisional step and can beat once out without the use of special locking devices, while thelocking of the worm wheel in the position of rest is effected by thelocking bolt 92 engaging the displaceable pedestal h.

I claim:

1. In a lathe, the combination, with the head stock, of a pedestalswingingly mounted at its foot on the head stock; a vertical worm shaftin said pedestal, a worm mounted on said shaft; a worm wheel fixed onthe head stock shaft and engaged by said worm for rotating the headstock shaft step-bystep; a horizontally disposed graduated disk mountedon the upper end of the pedestal; a main indicator attached to the wormshaft and having its end disposed over the graduations of the main disk;means for rotating the worm shaft; a limiting indicator capable of beingadjusted in advance of the main indicator and to limit the movementthereof; and means for rigidly securing the limiting indicator to themain indicator so that they move together.

2. In a lathe, the combination, with the head stock, of a pedestalswingingly mounted at its foot on the head stock; a vertical worm shaftin said pedestal; a worm mounted on the said shaft; a worm wheel fixedon the head stock shaft and engaged by said worm for rotating the headstock shaft stepby-step; a main horizontally disposed graduated diskmounted on the upper end of the pedestal; a main indicator attached tothe worm shaft and having its end disposed over the graduations of themain disk; means In testimony whereof I have hereunto set for rotatingthe Worm shaft; an auxiliary my hand in the presence of two subscrlblngindicator arranged diametrically opposite to the main indicator alimiting indicator Witnesses. capable of being adjusted in advance ofthe J OSEF FEIGE. main indicator, and means for rigidly se- Witnesses:

ALFRED GABEL,

curing the limiting indicator to the main FRANK Gr. Por'rs.

indicator so that they move together.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

